code: def function_proxy():
      def fast_func():
          """
          Fast doc
          """
          return "fast func"
  
      def slow_func():
          """
          Slow doc
          """
          return "slow_func"
  
      return fast_func, slow_func, _FunctionProxy(fast_func, slow_func)
  
imports: import inspect
  from functools import partial
  from io import StringIO
  import numpy
  import pytest
  from cudf.pandas.fast_slow_proxy import _fast_arg, _FunctionProxy, _slow_arg, _transform_arg, _Unusable, make_final_proxy_type, make_intermediate_proxy_type
label_desc: Use image node_id 2 for calling a global function with example usage: function_proxy() and returns: fast_func,  slow_func,  _FunctionProxy, str, str